* {
    margin: 0;
    padding: 0;
}

html,
body,
#mask {
    width: 100%;
    height: 100%;
}

#mask {
    background-color: #c9c9c9;
    position: relative;
}

#mask .center {
    position: absolute;
    background-color: #fff;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    padding: 10px;
}

#mask .center .title {
    position: absolute;
    display: flex;
    align-items: center;
    height: 56px;
    top: -61px;
    left: 0;
    padding: 5px;
    padding-left: 10px;
    padding-bottom: 0;
    color: rgba(175, 47, 47, 0.8);
    font-size: 26px;
    font-weight: normal;
    background-color: white;
    padding-right: 50px;
    z-index: 2;
}

#mask .center .title img {
    height: 40px;
    margin-right: 10px;
}

#mask .center .title::before {
    content: "";
    position: absolute;
    width: 0;
    height: 0;
    border: 65px solid;
    border-color: transparent transparent white;
    top: -65px;
    right: -65px;
    z-index: 1;
}

#mask .center>img {
    display: block;
    width: 700px;
    height: 458px;
}

#mask .center a {
    text-decoration: none;
    width: 45px;
    height: 100px;
    position: absolute;
    top: 50%;
    margin-top: -36px;
    vertical-align: middle;
    opacity: 0.5;
}

#mask .center a :hover {
    opacity: 0.8;
}

#mask .center .left {
    left: 15px;
    text-align: left;
    padding-right: 10px;
    border-top-right-radius: 10px;
    border-bottom-right-radius: 10px;
}

#mask .center .right {
    right: 15px;
    text-align: right;
    padding-left: 10px;
    border-top-left-radius: 10px;
    border-bottom-left-radius: 10px;
}